int
NC_urlmodel(const char* path, int cmode, char** newurl, NCmode* model)
{
int stat = NC_NOERR;
int found = 0;
struct NCPROTOCOLLIST* protolist;
NCURI* url = NULL;
const char** fragp = NULL;
if(path == NULL) return 0;
/* Parse the url */
if(ncuriparse(path,&url) != NCU_OK)
return NC_EINVAL; /* Not parseable as url */
/* Look up the protocol */
for(found=0,protolist=ncprotolist;protolist->protocol;protolist++) {
if(strcmp(url->protocol,protolist->protocol) == 0) {
found = 1;
break;
}
}
if(found) {
model->implementation = protolist->implementation;
/* Substitute the protocol in any case */
if(protolist->substitute) ncurisetprotocol(url,protolist->substitute);
} else
{stat = NC_EINVAL; goto done;} /* Again, does not look like a url */
/* Iterate over the url fragment parameters */
for(fragp=ncurifragmentparams(url);fragp && *fragp;fragp+=2) {
const char* name = fragp[0];
const char* value = fragp[1];
if(strcmp(name,"protocol")==0)
name = value;
if(strcasecmp(name,"dap2") == 0) {
model->format = NC_FORMAT_NC3;
model->implementation = NC_FORMATX_DAP2;
/* No need to set iosp field */
} else if(strcasecmp(name,"dap4") == 0) {
model->format = NC_FORMAT_NETCDF4;
model->implementation = NC_FORMATX_DAP4;
/* No need to set iosp field */
} else if(strcmp(name,"mode")==0) {
if((stat = url_getmodel(value,model))) goto done;
}
}
if(model->implementation == 0) {/* Last resort: use the cmode */
/* If mode specifies netcdf-4, then this is assumed to be dap4 */
if(cmode & NC_NETCDF4) {
model->implementation = NC_FORMATX_DAP4;
} else {/* Default is DAP2 */
model->implementation = NC_FORMATX_DAP2;
}
}
if(model->implementation == 0) goto done; /* could not interpret */
switch (model->implementation) {
case NC_FORMATX_NC3:
model->format = NC_FORMAT_NC3;
break;
case NC_FORMATX_NC4:
model->format = NC_FORMAT_NETCDF4;
break;
case NC_FORMATX_DAP2:
model->format = NC_FORMAT_NC3;
break;
case NC_FORMATX_DAP4:
model->format = NC_FORMAT_NETCDF4;
break;
case NC_FORMATX_ZARR:
model->format = NC_FORMAT_NETCDF4;
break;
default:
stat = NC_EINVAL;
goto done;
}
done:
if(newurl)
*newurl = ncuribuild(url,NULL,NULL,NCURIALL);
if(url) ncurifree(url);
return stat;
}
static int
processuri(const char* path, NCURI** urip, char** newpathp, NClist* modeargs)
{
int stat = NC_NOERR;
int found = 0;
const char** fragp = NULL;
struct NCPROTOCOLLIST* protolist;
NCURI* uri = NULL;
size_t pathlen = strlen(path);
if(path == NULL || pathlen == 0) {stat = NC_EURL; goto done;}
/* Defaults */
if(newpathp) *newpathp = NULL;
if(urip) *urip = NULL;
if(ncuriparse(path,&uri) != NCU_OK) goto done; /* not url */
/* Look up the protocol */
for(found=0,protolist=ncprotolist;protolist->protocol;protolist++) {
if(strcmp(uri->protocol,protolist->protocol) == 0) {
found = 1;
break;
}
}
if(!found)
{stat = NC_EINVAL; goto done;} /* unrecognized URL form */
/* process the corresponding mode arg */
if(protolist->mode != NULL)
nclistpush(modeargs,strdup(protolist->mode));
/* Substitute the protocol in any case */
if(protolist->substitute) ncurisetprotocol(uri,protolist->substitute);
/* Iterate over the url fragment parameters */
for(fragp=ncurifragmentparams(uri);fragp && *fragp;fragp+=2) {
const char* name = fragp[0];
const char* value = fragp[1];
if(strcmp(name,"protocol")==0) {
nclistpush(modeargs,strdup(value));
} else
if(strcmp(name,"mode")==0) {
if((stat = parseurlmode(value,modeargs))) goto done;
} else
if(issingleton(name) && (value == NULL || strlen(value)==0)) {
nclistpush(modeargs,strdup(name));
} /*else ignore*/
}
/* At this point modeargs should contain all mode args from the URL */
/* Rebuild the path (including fragment)*/
if(newpathp)
*newpathp = ncuribuild(uri,NULL,NULL,NCURIALL);
if(urip) {
*urip = uri;
uri = NULL;
}
done:
if(uri != NULL) ncurifree(uri);
return check(stat);
}
int
NC_urlmodel(const char* path, int mode, char** newurl)
{
int found, model = 0;
struct NCPROTOCOLLIST* protolist;
NCURI* url = NULL;
char* p;
if(path == NULL) return 0;
/* find leading non-blank */
for(p=(char*)path;*p;p++) {if(*p != ' ') break;}
/* Do some initial checking to see if this looks like a file path */
if(*p == '/') return 0; /* probably an absolute file path */
/* Parse the url */
if(ncuriparse(path,&url) != NCU_OK)
goto fail; /* Not parseable as url */
/* Look up the protocol */
for(found=0,protolist=ncprotolist;protolist->protocol;protolist++) {
if(strcmp(url->protocol,protolist->protocol) == 0) {
found = 1;
break;
}
}
if(found) {
model = protolist->model;
/* Substitute the protocol in any case */
if(protolist->substitute) ncurisetprotocol(url,protolist->substitute);
} else
goto fail; /* Again, does not look like a url */
if(model != NC_FORMATX_DAP2 && model != NC_FORMATX_DAP4) {
/* Look for and of the following params:
"dap2", "protocol=dap2", "dap4", "protocol=dap4" */
const char* proto = NULL;
const char* match = NULL;
if((proto=ncurilookup(url,"protocol")) == NULL) proto = NULL;
if(proto == NULL) proto = "";
if((match=ncurilookup(url,"dap2")) != NULL || strcmp(proto,"dap2") == 0)
model = NC_FORMATX_DAP2;
else if((match=ncurilookup(url,"dap4")) != NULL || strcmp(proto,"dap4") == 0)
model = NC_FORMATX_DAP4;
else
model = 0; /* Still don't know */
}
if(model == 0) {/* Last resort: use the mode */
/* If mode specifies netcdf-4, then this is assumed to be dap4 */
if(mode & NC_NETCDF4)
model = NC_FORMATX_DAP4;
else
model = NC_FORMATX_DAP2; /* Default */
}
if(newurl)
*newurl = ncuribuild(url,NULL,NULL,NCURIALL);
if(url) ncurifree(url);
return model;
fail:
if(url) ncurifree(url);
return 0;
}